Divi Fragment Cache

WordPress plugin that adds fragment caching for Divi module shortcodes (et_pb_*), reducing PHP work and render time on pages with many repeated sections/modules.

Requirements

• WordPress 5.8+
• PHP 7.4+
• Divi theme/builder (uses et_pb_* shortcodes)

How it works

• Hooks into shortcode execution via pre_do_shortcode_tag and do_shortcode_tag.
• For each Divi module it computes a cache key based on:
  • current post
  • locale
  • shortcode tag
  • occurrence (render order)
  • shortcode attributes and inner content
• Caches:
  • module HTML
  • builder-generated CSS during the first execution (when available)

Settings

Path: “Settings → Divi Fragment Cache”.

• Cache TTL (seconds): 0 disables caching.
• Cache for logged-in users: disabled by default.
• Debug header: adds X-Divi-FC to the response (hits/misses/bypass/purges).
• Deny/allow shortcodes: one tag per line.

Debug / Query params

• Cache bypass:
  • ?divi_fc_bypass=1
• Purge cache for current post:
  • ?divi_fc_purge=1

Hooks / Filters

• divi_fragment_cache_ttl (int): TTL in seconds.
• divi_fragment_cache_logged_in (bool): enable/disable caching for logged-in users.
• divi_fragment_cache_denied_tags (array): denied shortcode tags.
• divi_fragment_cache_allowed_tags (array): allowed shortcode tags (if not empty, acts as a whitelist).

Uninstall

Removes the dfc_options option and the _divi_fragment_cache_keys post meta used to track cache keys associated with posts.